A large plume of ash and gas rises from the dark basaltic volcano and drifts to the southeast.Sicilys Mount Etna is one of the most consistently active volcanoes in the world, with a historical record of eruptions dating back to 1500 BC.With one exception, all samples gave high-quality intensity results.Two or three subsamples from each sample were investigated and a weighted average calculated to give a single estimate of the field.1996, 1999), and here we present results for historic lavas from Mt Etna, Sicily.20 samples were randomly selected from 10 different historic flows dating from 1843 to 1983.
The Moai statues on Easter Island stand as awe inspiring testament to a now lost civilisation.
The specifics — whether they’ll go far enough to mitigate warming, whether they’ll stand up to legal challenges, etc.
— are sure to be much discussed in the ensuing weeks and months.
As the island’s population expanded, the people started to over-exploit its resources, triggering an ecological catastrophe which in turn led to a social one.
Scientific evidence supports this hypothesis by revealing a period of dramatic deforestation between 1200 CE and 1400 CE.